47 research outputs found

    New generic indexing technology

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    There has been no fundamental change in the dynamic indexing methods supporting database systems since the invention of the B-tree twenty-five years ago. And yet the whole classical approach to dynamic database indexing has long since become inappropriate and increasingly inadequate. We are moving rapidly from the conventional one-dimensional world of fixed-structure text and numbers to a multi-dimensional world of variable structures, objects and images, in space and time. But, even before leaving the confines of conventional database indexing, the situation is highly unsatisfactory. In fact, our research has led us to question the basic assumptions of conventional database indexing. We have spent the past ten years studying the properties of multi-dimensional indexing methods, and in this paper we draw the strands of a number of developments together - some quite old, some very new, to show how we now have the basis for a new generic indexing technology for the next generation of database systems

    EuroEXA - D2.6: Final ported application software

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    This document describes the ported software of the EuroEXA applications to the single CRDB testbed and it discusses the experiences extracted from porting and optimization activities that should be actively taken into account in future redesign and optimization. This document accompanies the ported application software, found in the EuroEXA private repository (https://github.com/euroexa). In particular, this document describes the status of the software for each of the EuroEXA applications, sketches the redesign and optimization strategy for each application, discusses issues and difficulties faced during the porting activities and the relative lesson learned. A few preliminary evaluation results have been presented, however the full evaluation will be discussed in deliverable 2.8

    Studies in the linguistic sciences. 08 (1978)

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    MLA international bibliography of books and articles on the modern languages and literatures (Complete edition) 0024-821

    Spline wavelet image coding and synthesis for a VLSI based difference engine

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    Bibliography: leaves 142-146.The efficiency of an image compression/synthesis system based on a spline multi-resolution analysis (MRA) is investigated. The proposed system uses a quadratic spline wavelet transform combined with minimum-mean squared error vector quantization to achieve image compression. Image synthesis is accomplished by utilizing the properties of the MRA and the architecture of a custom designed display processor, the Difference Engine. The latter is ideally suited to rendering images with polynomial intensity profiles, such as those generated by the proposed spline :V1RA. Based on these properties, an adaptive image synthesis system is developed which enables one to reduce the number of instruction cycles required to reproduce images compressed using the quadratic spline wavelet transform. This adaptive approach is computationally simple and fairly robust. In addition, there is little overhead involved in its implementation

    From theory to practice: A multiple case study on novice administrators

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    Virtual Forced Splitting, Demotion and the BV-Tree

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    Bowdoin Orient v.82, no.1-25 (1952-1953)

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    https://digitalcommons.bowdoin.edu/bowdoinorient-1950s/1003/thumbnail.jp

    Tales From the Magazine Prison House: Democracy and Authorship in American Periodical Fiction, 1825-1850.

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    In the second quarter of the nineteenth century, weekly and monthly periodicals emerged as the primary forum for new American literature. In several respects periodicals reflected the multiplicity of rapidly growing Eastern cities: they assembled a variety of voices in single texts and maintained a dialogue between editors and readers. At the same time, the magazines sought to create a more homogenous middle-class audience that would equate the capitalist transformation of American society with the natural progress of democracy. This dissertation examines that process by analyzing the writing and careers of four magazinists : Nathaniel Parker Willis, Caroline Kirkland, Lydia Maria Child, and Edgar Allan Poe. All four edited periodicals, all were a part of the New York literary scene of the 1840s, and all wrote numerous prose pieces that would be classified today as short stories. However, their careers took very different directions as each writer focused much of his or her writing on a distinct segment of American society: Willis on aristocratic New Yorkers and Saratogans, Kirkland on Western settlers, Child on oppressed minorities, and Poe on modern businessmen and the members of his own profession. I argue that as these four writers exploited the desire of their audience to know about and categorize these American subcultures, they both embraced and challenged--to various degrees--the optimistic myths that would solidify a national middle-class culture. Their work and their careers in what Poe called the magazine prison-house present four contrasting visions of American democracy
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